Bought a chargemaster 3 years ago and use it all the time. Absolutely no problems. This is absolutely the single greating tool I own for developing loads.
One thing I strongly recommend is to be aware of the drain valve. It must be closed after you drain the powder
. I ended up placing a 2" orange shooting peel and stick target dot with the words "Check dump valve before filling" on the powder reservoir.
Check Natchez as they have the best prices I have seen.